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math.DG2025
Lorentzian symmetric spaces which are Einstein-Yang-Mills with respect to invariant metric connections
Marco Castrillón López, Pedro M. Gadea, Eugenia Rosado Maria
We classify four-dimensional connected simply-connected indecomposable Lorentzian symmetric spaces with connected nontrivial isotropy group furnishing solutions of the Einstein…
math.DG2025
Lifting diffeomorphisms to vector bundles
Jaime Muñoz Masqué, Eugenia Rosado María, Ignacio Sánchez Rodríguez
Criteria for a diffeomorphism of a smooth manifold to be lifted to a linear automorphism of a given real vector bundle , are stated. Examples are includ…